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Operation and Maintenance MultiVOIP User Guide
438
T1 Statistics: Field Definitions (cont’d)
Field
Name
Values Description
Yellow
Alarm
Tally since last
reset.
The alarm signal sent by a remote T1/E1
device to indicate that it sees no receive
signal or cannot synchronize on the
receive signal.
Frame
Search
Restart Flag
[To be supplied.]
Loss of
MultiFrame
Alignment
Tally since last
reset.
In D4 or ESF mode, displayed value will
increment if multiframe alignment has
been lost or if loss of frame alignment has
been detected.
Transmit
Slip
Tally since last
reset.
Slip in transmitted data stream. Slips
indicate a clocking mismatch (or lack of
synchronization) between T1/E1 devices.
When slips occur, data may be lost or
repeated.
Pulse
Density
Violation
The pulse density of the received data
stream is below the requirement defined
by ANSI T1.403 or more than 15
consecutive zeros are detected.
Line
Loopback
Activation
Signal
The line loopback activation signal
has been detected in the received bit
stream.
Transmit
Line Open
At least 32 consecutive zeros were
transmitted.
Transmit
Data
Underrun
For use by MTS Technical Support
Personnel.
Transmit
Slip
Negative
The frequency of the transmit clock is
greater than the frequency of the
transmit system interface working
clock. A frame is skipped.